<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>媒体查询（media）</title>
    <style>
      
        /* PC端 */
        @media screen and (min-width:960px){
            body{
                background: pink;
            }
        }
        /* pad端 */
        @media screen and (min-width:750px) and (max-width:960px) {
            body{
                background: red;
            }
        }
        /* 手机端 */
        @media screen and (max-width:750px) {
            body{
                background: blue;
            }
        }
    </style>
</head>
<body>
   
</body>
</html>